/Engine/Source/Runtime/StaticMeshDescription/Public/StaticMeshOperations.h
Find all overlapping vertex using the threshold in the mesh description.
static void FindOverlappingCorners ( [FOverlappingCorners](API\Runtime\MeshUtilitiesCommon\FOverlappingCorners) & OverlappingCorners, const [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & MeshDescription, float ComparisonThreshold )